A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 6685-00-798-5211
NSN 5999-00-143-8489
NSN 5945-01-269-4385
NSN 6320-01-078-8257
NSN 6685-00-974-2596
NSN 6650-01-181-6037
NSN 7035-00-834-2090
NSN 5855-00-004-0904
NSN 5905-00-739-0764
NSN 6150-00-424-5340
NSN 6135-00-100-8890
NSN 5925-01-560-4805